Yellowstone, Grand Loop Drive Interpretive Guide    by David Gafney
Price: $3.95 USD. 10450 words. Published on February 3, 2011. .
Written by a former Yellowstone ranger-naturalist and illustrated with 40 spectacular wilderness images, Yellowstone's Grand Loop Drive will allow you to experience a vicarious 142-mile journey through the heart of one of America's truly great national parks. If visiting Yellowstone, print out and take this eBook with you - It's like having your own interpretive ranger along for the ride!

Saving Pachyrhinosaurus    by Thomas Hopp
Price: $0.99 USD. 9370 words. Published on February 29, 2012. .
Observing wildlife in Yellowstone Park can be dangerous, especially when the animals you're observing are dinosaurs brought back to earth after 65 million years!